Proposal: suggest python.org packages for macOS

[dschep]

As @glyph pointed out in #359 and on twitter[0] using homebrew to install Python has its own issues. Also, brew install'ed versions of Python also mess with packaging[1][2] in ways that alter pip's behavior in odd ways (not even all documented). Is there any reason not to recomend installing the packages on python.org?

[0] https://twitter.com/glyph/status/950587032102780928 [1] https://docs.brew.sh/Homebrew-and-Python.html#note-on-pip-install---user [2] https://github.com/Homebrew/brew/pull/821 [3] https://github.com/UnitedIncome/serverless-python-requirements#applebeersnake-mac-brew-installed-python-notes

[dschep]

Also has the perk of not requiring XCode

[sandrogisler]

Further note that macOS now comes with python3, making it less necessary to install python separately. See https://github.com/realpython/python-guide/issues/1032